• 한국인쇄학회지
• /
• 제29권3호
• /
• pp.105-124
• /
• 2011

TFT-LCD consists of LCD panel on the top, circuit unit on the side and BLU on the bottom. The recent development issues of BLU-dependent TFT-LCD have been power consumption minimization, slimmerization and size maximization. As a result of this trend, LED is adopted as BLU instead of CCFL to increase brightness and to reduce thickness. In liquid crystal displays, the light efficiency is below 10% due to the loss of light in the path from a light source to an LCD panel and presence of absorptive polarizer. This low efficiency results in low brightness and high power consumption. One way to circumvent this situation is to use a reflective polarizer between backlight units and LCD panels. Since a nano-wire grid polarizer has been known as a reflective polarizer, an idea was proposed that it can be used for the enhancement of the brightness of LCD. The use of reflective polarizing film is increasing as edge type LED TV and 3D TV markets are growing. This study has been carried out to fabrication of the nano-wire grid polarizer(NWGP) and investigated the brightness enhancement of LCD through polarization recycling by placing a NWGP between an c and a backlight unit. NWGPs with a pitch of 200nm were fabricated using laser interference lithography and aluminum sputtering and wet etching. And The NWGP fabrication process was using by the UV imprinting and was applied to plastic PET film. In this case, the brightness of an LCD with NWGPs was 1.21 times higher than that without NWGPs due to polarization recycling.

• 한국실내디자인학회논문집
• /
• 제16권5호
• /
• pp.89-97
• /
• 2007

This study compares, analyzes and reevaluates color conditions and images before and after the execution of the 7th curriculum with elementary schools in Gwang-ju Metropolitan City based on the fact that color among physical environments of elementary classrooms has an important influence on children's emotion and draws problems and aims to accumulate the basic materials for preparing guidelines of improving color environment at general classrooms of elementary schools. Consequently, according to color conditions, major colors on ceiling and wall were high brightness/nigh chroma of Y and YR line regardless of division of grades and other color factors of classroom showed that wall and ceiling used similar colors, but brightness was higher after change than before it. In evaluation of color images, lower grades showed negative color images such as 'common,' 'rustic,' and 'strange' before change, but they showed positive color images after change such as 'clean,' 'unique,' and 'soft'. But, most of higher grades showed negative reactions before change such as 'common,' 'strange,' and 'rustic' and they showed positive reactions after change only in such items as 'clean,' 'warm,' and 'unique', but Indicated negative reactions in remaining items such as 'strange,' 'rustic,' 'stiff,' and 'artificial'. Accordingly, in using colors for lower grade classroom, arrangement of colors through adjustment of brightness and chroma between ceiling, wall and other components based on coloring of high brightness and low chroma of similar colors should be considered and for higher grade classroom, arrangement of colors of unique images of mid-brightness/mid-chroma among warm color lines of similar colors should be examined.

• 한국주거학회논문집
• /
• 제14권6호
• /
• pp.147-154
• /
• 2003

This study examines and analyzes the current status, characteristics and properties of Super-Graphic as a visual element with Super Graphic designed on the wall of apartment housing, typifies them and explains the preference and evaluative structure by each type. The results of this study are as follows： According to color environment of Super-Graphic, N-tone colors are 21.4％ and YR-tone colors are 14.5％. In the whole distribution, cold color tone is 41.4％ and warm color tone is 37.2％. In the brightness, 72.9％ of the entire Super Graphic use high brightness and in the saturation, 51.2％ show low saturation, achromatic colors are 21.4％ and high saturation is 16.5％. As a result of conducting SD test to analyze the preference of Super-Graphic, 'wonderful' is most negative variable, followed by 'heterogeneous', 'splendid', 'romantic' variety'. Positive variables are 'monotone', 'stable' and 'calm'. As a result of factor analysis to reveal the evaluative structure of Super Graphic image based on the above results, five factors including brightness, saturation, stability, harmony and ordered are extracted and it is considered that these are important variables to be reflected in designing Super Graphic in future.

• 한국전기전자재료학회논문지
• /
• 제20권8호
• /
• pp.731-735
• /
• 2007

We developed the 4channel Light Medical Therapy Apparatus for External Injury Cure using a high brightness LED. This equipment was fabricated using a micro-controller and a high brightness LED, and designed to enable us to control light irradiation time, intensity, frequency and so on, Especially, to control the light irradiation frequency, FPGA was used, and to control the change of output value, TLC5941 was used. Control stage is divided into 4 levels by program. Consequently, the current value could be controlled by the change of level in Continue Wave(CW) and the output of a high brightness LED could be controlled stage by stage. Compared with one LED irradiation, several LEDs irradiation could increase optical power.

• 한국전기전자재료학회:학술대회논문집
• /
• 한국전기전자재료학회 2008년도 춘계학술대회 논문집
• /
• pp.10-11
• /
• 2008

We developed the equipment palpating cell proliferation using a high brightness LED. This equipment was fabricated using a micro-controller and a high brightness LED, and designed to enable us to control light irradiation time, intensity, frequency and so on. Especially, to control the light irradiation frequency, FPGA was used, and to control the change of output value, TLC5941 was used. Control stage is divided into 30 levels by program. Consequently, the current value could be controlled by the change of level in Continue Wave(CW) and Pulse Width Modulation(PWM), and the output of a high brightness LED could be controlled stage by stage. And then, each experiment was performed to irradiation group and non-irradiation group for bone marrow cells. MIT assay method was chosen to verify the cell increase of two groups and the effect of irradiation on cell proliferation was examined by measuring 590nm transmittance of ELISA reader. As a result, the cell increase of bone marrow cells was verified in irradiation group as compared to non-irradiation group.

• 한국전기전자재료학회:학술대회논문집
• /
• 한국전기전자재료학회 2007년도 추계학술대회 논문집
• /
• pp.497-497
• /
• 2007

We developed the light medical therapy apparatus for external injury cure using a ${\mu}$-controller. This equipment was fabricated by using a high brightness LEDs and a ATmega 128, and designed to enable us to control irradiation timer, intensity and reservation. Especially, to control the light irradiation frequency, and to control the change of output value, TLC5941 was used. Control stage is divided into 4 step by program. Consequently, the current value could be controlled by the change of level in Continue Wave(CW) and the output of a high brightness LEDs could be controlled, stage by stage. In this paper, the designed device was used to find out how a high brightness LEDs light source affects the skin wound of a small animal. In result, compared with none light irradiation animal, the lower incidence of inflammation and faster recovery was shown in light irradiation animal.

• 한국전기전자재료학회:학술대회논문집
• /
• 한국전기전자재료학회 2007년도 하계학술대회 논문집 Vol.8
• /
• pp.480-480
• /
• 2007

This paper performed the basic study for developing the light therapy equipment for medical treatment. We developed the equipment for medical therapy using a high brightness LED. This equipment was fabricated using a micro-controller and a high brightness LED, and designed to enable us to control light irradiation time, intensity, frequency and so on. Especially, to control the light irradiation frequency, and to control the change of output value, TLC5941 was used. Control stage is divided into 4 step by program. Consequently, the current value could be controlled by the change of level in Continue Wave(CW) and the output of a high brightness LED could be controlled, stage by stage.

• 한국식품영양학회지
• /
• 제30권3호
• /
• pp.552-559
• /
• 2017

This research investigated quality characteristic and sensual characteristic of Chilhyanggye recipe comparing to general Samgyetang, through restoring the recipe recorded in old documents. pH appeared 6.60, high in control group, while Ungchu and Baekssemi Samgyetang displayed respectively 6.42, 6.41, no significant difference from control group, however Ungchu and Baekssemi chilhyanggye displayed 5.89, 5.90, significantly low. Brightness of breast appeared significantly high in Baekssemi Samgyetang however reddishiness appeared high in Ungchu Chilhyanggye, while yellowishness appeared high in Baekssemi Chilhyanggye compared to other groups. Brightness of chicken leg appeared highest in Baekssemi Chilhyanggye, significantly higher than other groups (p<0.05). Reddishness appeared higher in control group, however appeared low in Samgyetang. Brightness value of soup appeared very high in control group, Ungchu, and Baekssemi Chilhyanggye, which seems to be due to difference in chicken recipe. In case of reddishness, Ungchu Chilhyanggye appeared the highest, and significantly high in order of Baekssemi Chilhyanggye, Baekssemi Samgyetang (p<0.05). Yellowishness appeared significantly high in control group (p<0.05). Hardness of intensity of breast appeared highest in Ungchu Samgyetang and Ungchu Chilhyanggye, and in order of Baekssemi Samgyetang, Baekssemi Chilhyanggye, which seems to be the result of diversity of breed and using vinegar in recipe. Investigation of preference appeared significantly high in color, fragrance, taste, and overall preference in Ungchu and Baekssemi Chilhyanggye compared to control group and Samgyetang (p<0.001). Ungchu Chilhyanggyetang appeared significantly high in overall preference (p<0.001). Calorie appeared higher in Baekssemi compared to Ungchu, while Samgyetang displayed higher value than Chilhyanggye. Carbohydrate appeared higher in Samgyetang than Chilhyanggye. Crude protein content appeared higher in Ungchu breed than Baekssemi breed, on the contrary, crude fat appeared low. Saturated fat and cholesterol apepared lower in Ungchu than Baekssemi.

• 지적과 국토정보
• /
• 제47권2호
• /
• pp.19-37
• /
• 2017

VIIRS-DNB 데이터는 기존의 DMSP-OLS 데이터에 비해 야간에 발생하는 빛의 밝기를 측정하는데 더 우수한 성능을 보여준다. 하지만 지금까지 우리나라에서 VIIRS-DNB 데이터를 이용해 야간 빛의 분포 변화를 분석한 연구는 상당히 드물다. 이 연구에서는 우리나라의 수도권을 대상으로 2013~2016년간의 야간 빛의 분포 및 변화 패턴을 파악하고, 공간회귀모델을 통해 그 요인을 분석하였다. 이를 위해 두 시점 간의 변화를 살펴봄은 물론 계절간 변화 양상 또한 함께 분석하였다. 주요한 결과는 다음과 같다. 첫째, 2013년과 2016년 두 시점 모두 야간 빛은 서울과, 인천, 그리고 서울과 인접한 경기도의 도시에 집중되어 인구밀도 및 주거지관련요인, 경제토지이용관련요인 등과의 연관성을 나타내었다. 둘째, 2013년과 2016년을 비교해보면 야간 빛의 강도는 특히 서울에서 약화되는 경향을 보이고 있는데, 이는 인구밀도의 변화 및 산업용 건물의 비중과 관련된 것으로 나타났다. 셋째, 서울, 그리고 인천과 경기도의 주변 지역들은 야간 빛의 계절 변동성이 높게 나타났는데, 겨울(12월, 1월, 2월) 및 가을(10월, 11월)에 빛의 강도가 가장 강하게 나타났다. 넷째, 야간 빛의 계절간 변동은 적설면적 변화와 유의미하게 양적 상관관계 나타났고, 알베도의 변화와 유의미하게 음적 상관관계 나타났다.

• 펄프종이기술
• /
• 제34권4호
• /
• pp.30-36
• /
• 2002

This research was conducted to investigate the feasibility of using deinked pulp of white ledger(DIP) for the manufacture of high quality premium tissue. The three types of tissues were prepared using the softener treated bleached DIP, softener treated mixed pulp of unbleached DIP and virgin pulp, and untreated mixed pulp of bleached DIP and virgin pulp, respectively, and their tensile index. softness, and brightness were measured and compared. The bulk and surface softness increased only slightly by the addition of softener(0.2% mineral oil) into the bleached DIP. The tensile index was decreased by 15∼30%, and the brightness was the range of 86% to 87% ISO. The softener(0.2∼0.8% mineral oil or dialkyl imidazoline) treatment of mixed pulp of unbleached DIP and virgin pulp Improved the bulk and surface of tissue considerably. However, the brightness was low as 85% ISO or below. Although the softness of the tissue made from bleached DIP blended with virgin pulp was the lowest among three types of tissues evaluated, its tensile index was the highest and brightness was 87∼88% ISO. Based on the results, it may be predicted that the bleached DIP blended with virgin pulp is the best raw material for the manufacture of high quality premium tissue if softener treatment is applied to mixed pulp, because the softness can be improved by the addition of softener. In general, the softness of tissue was improved with the increase in the amount of softener: However, the tensile index inversely proportional to the amount of softener added. Dialkyl imidazoline was more effective than mineral oil with respect to the improvement in softness, even though the loss in tensile index was severe with the treatment of dialkyl imidazoline.